126166329602 has 4 divisors (see below), whose sum is σ = 189249494406. Its totient is φ = 63083164800.

The previous prime is 126166329599. The next prime is 126166329607. The reversal of 126166329602 is 206923661621.

It is a Cunningham number, because it is equal to 355199²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 206923661621 = 24061 ⋅8599961.

It can be written as a sum of positive squares in only one way, i.e., 126166329601 + 1 = 355199^2 + 1^2 .

It is not an unprimeable number, because it can be changed into a prime (126166329607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31541582399 + ... + 31541582402.

Almost surely, 2^126166329602 is an apocalyptic number.

126166329602 is a deficient number, since it is larger than the sum of its proper divisors (63083164804).

126166329602 is an equidigital number, since it uses as much as digits as its factorization.

126166329602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63083164803.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 126166329602 in words is "one hundred twenty-six billion, one hundred sixty-six million, three hundred twenty-nine thousand, six hundred two".